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Regions L2 Landing Page Tabs

Filter Total Items: 944
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Year Published: 2002

Progress on geoenvironmental models for selected mineral deposit types

Since the beginning of economic geology as a subdiscipline of the geological sciences, economic geologists have tended to classify mineral deposits on the basis of geological, mineralogical, and geochemical criteria, in efforts to systematize our understanding of mineral deposits as an aid to exploration. These efforts have led to classifications...

Seal, Robert R.; Foley, Nora K.
Progress on geoenvironmental models for selected mineral deposit types, edited by R. R. Seal, II and N. K. Foley; 2002; OFR; 2002-195; edited by Seal, Robert R., II; Foley, Nora K.

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Year Published: 2002

Case study of the environmental signature of a recently abandoned, carbonate-hosted replacement deposit; the Clayton Mine, Idaho

Hammarstrom, J.M.; Eppinger, R.G.; Gosen, B.S.; Briggs, P.H.; Meier, A.L.
Case study of the environmental signature of a recently abandoned, carbonate-hosted replacement deposit; the Clayton Mine, Idaho; 2002; OFR; 2002-10; Hammarstrom, J. M.; Eppinger, R. G.; Gosen, B. S.; Briggs, P. H.; Meier, A. L.

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Year Published: 2002

To sell or not sell: Assessments of Bangladesh hydrocarbons

A decision by the government of Bangladesh to sell or not sell some of its natural gas reserves to neighboring countries in South Asia will be important in determining the economic future of Bangladesh, a country with an area about equal to Wisconsin.Bangladesh is a country of 150 million people, many of whom live at or below the poverty line. It...

Milici, Robert C.; Warwick, Peter D.; Attanasi, Emil D.; Wandrey, Craig J.

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Year Published: 2002

Lithogeochemical character of near-surface bedrock in the New England coastal basins

This geographic information system (GIS) data layer shows the generalized lithologic and geochemical, termed lithogeochemical, character of near-surface bedrock in the New England Coastal Basin (NECB) study area of the U.S. Geological Survey's National Water Quality Assessment (NAWQA) Program. The area encompasses 23,000 square miles in western...

Robinson, Gilpin R.; Ayotte, Joseph D.; Montgomery, Denise L.; DeSimone, Leslie A.
Lithogeochemical character of near-surface bedrock in the New England coastal basins; 2002; OFR; 2002-7; Robinson, Gilpin R., Jr.; Ayotte, Joseph D.; Montgomery, Denise L.; DeSimone, Leslie A.

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Year Published: 2001

National Atlas of the United States Maps

The "National Atlas of the United States of America®", published by the U.S. Geological Survey (USGS) in 1970, is out of print, but many of its maps can be purchased separately. Maps that span facing pages in the atlas are printed on one sheet. Maps dated after 1970 and before 1997 are either revisions of original atlas maps or new maps published...

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Year Published: 2001

Reconnaissance of Stream Geomorphology, Low Streamflow, and Stream Temperature in the Mountaintop Coal-Mining Region, Southern West Virginia, 1999-2000

The effects of mountaintop removal coal mining and the valley fills created by this mining method in southern West Virginia were investigated by comparing data collected at valley-fill, mined, and unmined sites. Bed material downstream of valley-fill sites had a greater number of particles less than 2 millimeters and a smaller median particle size...

Wiley, Jeffrey B.; Evaldi, Ronald D.; Eychaner, James H.; Chambers, Douglas B.
Reconnaissance of Stream Geomorphology, Low Streamflow, and Stream Temperature in the Mountaintop Coal-Mining Region, Southern West Virginia, 1999-2000; 2001; WRI; 2001-4092; Wiley, Jeffrey B.; Evaldi, Ronald D.; Eychaner, James H.; Chambers, Douglas B.

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Year Published: 2001

Chromium

Papp, J.F.; Lipin, B.R.
Chromium; 2001; OFR; 2001-381; Papp, J. F.; Lipin, B. R.

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Year Published: 2001

Preliminary digital geologic map of the Appalachian Piedmont and Blue Ridge, South Carolina segment

A preliminary geology coverage of the Piedmont and Blue Ridge in South Carolina has been compiled at 1:5000,000 scale and digitized as part of a patchwork of coverages for the analysis of regional and national geochemical patterns that may have environmental and resource implications. It was produced from other compilations that incorporate more...

Horton, J. Wright; Dicken, Connie L.
Preliminary digital geologic map of the Appalachian Piedmont and Blue Ridge, South Carolina segment; 2001; OFR; 2001-298; Horton, J. Wright, Jr.; Dicken, Connie L.

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Year Published: 2001

Geochronology and geology of late Oligocene through Miocene volcanism and mineralization in the western San Juan Mountains, Colorado

This paper presents 25 new 40Ar/39Ar dates from the main calc-alkaline ash-flow sheets and related younger plutons of the western San Juan volcanic field, the ash-flow sheets of the Lake City caldera cycle, and veins and other altered rocks in the Lake City region. The goal of the study was to produce similar quality 40Ar/39Ar ages to those...

Bove, Dana J.; Hon, Ken; Budding, Karin E.; Slack, John F.; Snee, Lawrence W.; Yeoman, Ross A.
Geochronology and geology of late Oligocene through Miocene volcanism and mineralization in the western San Juan Mountains, Colorado; 2001; PP; 1642; Bove, Dana J.; Hon, Ken; Budding, Karin E.; Slack, John F.; Snee, Lawrence W.; Yeoman, Ross A.

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Year Published: 2001

Lithochronologic units and mineral deposits of the Appalachian Orogen from Maine to Alabama

Peper, J.D.; Gair, J.E.; Foose, M.P.; Kress, T.H.; Dicken, Connie
Lithochronologic units and mineral deposits of the Appalachian Orogen from Maine to Alabama; 2001; OFR; 2001-136; Peper, J. D.; Gair, J. E.; Foose, M. P.; Kress, T. H.; Dicken, C. L.

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Year Published: 2001

Precambrian basement map of the north Mid-Continent, U.S.A.; a digital representation of the 1990 P.K. Sims map

Dicken, Connie L.; Pimley, Shana G.; Cannon, William F.
Precambrian basement map of the north Mid-Continent, U.S.A.; a digital representation of the 1990 P.K. Sims map; 2001; OFR; 2001-21; Dicken, Connie L.; Pimley, Shana G.; Cannon, William F.

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Year Published: 2001

Silent reminders: geologic wonders of the George Washington and Jefferson National Forests

The iron industry played a vital role in the industrialization of the United States and in the development of the U.S. economy and society. Much of the early history of the iron industry took place in Virginia. The remains of 11 iron furnaces and nearby mines in the George Washington and Jefferson National Forests in Virginia and West Virginia are...

Silent reminders; geologic wonders of the George Washington and Jefferson national forests; 2001; USGS Unnumbered Series; GIP; Geological Survey (U.S.); Forest Service (U.S.)